Adjustable box wrench



May 22, 1945. 1 FLOWER 2,376,764

' ADJUSTABLE BOX WRENCH Filed Aug. 13, 1945 2 Sheets-Sheet May 22, 1945. G. FLOWER 2,376,754

ADJUSTABLE BOX WRENCH Filed Aug. 15, 1943 I 2 Sheets-Sheet 2 Ml l 7 Ala 1/3 I V/A W m fi/ i/dwfl M,

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Patented May 22, 1945 Eur OFFICE ADJUSTABLE. BOX WRENCH George Flower, Sparrows Point, Md. Application August 13, 1943, Serial No. 498,469

1 Claim.

The present invention relates to new and useful improvements in box wrenches, and has for its primary object to provide, in a manner as hereinafter set forth, a tool'of this type which is adapted to be expeditionsly adjusted to receive and firmly grip different sizes and types of nuts, bolt heads, cap, and set screws, et cetera.

Other objects of the invention are to provide an adjustable box wrench of the aforementioned character which will be comparatively simple in construction, strong, durable, highly emcient and reliable in use, compact, and which may be manufactured at low cost.

All of the foregoing, and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is an elevational view of a wrench constructed in accordance'with the present invention.

Figure 2 is an elevational view of a portion of the tool, taken at right angles to Figure 1.

Figure 3 is a longitudinal sectional view, taken substantially on the line 3-3 of Figure 2.

Figures 4, 5, 6 and I are cross-sectional views, taken substantially on thejlines 4-4, 55, 6-6 and 'l'l, respectively, of Figure 1.

Figure 8 is a detail view in perspective of the slidable inner jaw.

Figure 9 is a detail view in perspective of the screw or threaded shank for adjusting the slidable inner jaw.

Figure 10 is a perspective view of an end portion of the handle. 1

Figure 11 is a detail view in perspective of the plug which is inserted in the tubular shank on the body of the wrench.

Figure 12 is an elevational view, showing a slight modification.

Referring now to the drawings in detail, it will be seen that reference numeral I designates a body of suitable metal. Formed integrally with the body I and projecting from one end thereof is a substantially U-shaped, stationary outer jaw 2 having substantially V-shaped grooves 3 therein for the reception of the corner portion of nuts, bolt heads, et cetera. v

Projecting from the other end of the body I is an integral tubular shank 4. The shank 4 is engaged in a socket 5 on one end of a handle 6 for mounting the body I on said handle. The shank 4 and the socket 5 include coacting flat portions 1 and 8, respectively, for positively retaining the body I against rotation relative to the handle 6.

A metallic plug or pin 9 is driven into the tubular shank 4 for strengthening same.

A bore II in the body I communicates with v the tubular shank 4 and the interior of the jaw' 2. The body I is further provided with a transverse opening l2 which communicates with the bore I I. A screw [3 is slidable in-the bore II.

The screw I 3 includes a smooth, reduced end opening II for adjusting the slidable in'ner jaw lowtgward or away from the stationary outer ja It is thought that the manner in which the tool is used will be readily apparent from a consideration of the foregoing. Briefly, the nut bolt head, or other object to be gripped is engaged in the substantially U-shaped stationary outer jaw 2 of the wrench. The nut I8 is then turned for adjustingthe slidable inner jaw I 6 into 'engagement with the nut, bolt head, or the like. It will thus be seen that a box wrench has been provided which may be expeditiously and accurately adjusted. The ends of the adjustable inner jaw.

I6 are slidably engaged with the leg portions I9 of the substantially U-shaped stationary outer jaw 2 for preventing said inner jaw, together with the screw I3, from turning.

In the modification of Figure 12, of the draw- I ings, an angular shank 20 is provided. This angular shank 20 offsets the handle 6 relative to the body I to permit a. firm grip to be readily had on said handle when the tool is engaged with a nut or other object on a fiat surface.

It is, believed that the many advantages of an adjustable box wrench constructed in accordance with the present invention will be readily understood, and although preferred embodiments of the tool are as illustrated and described, it is to be understood that further modifications and changes in the details of construction may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

A wrench of the character described comprising a metallic body, a tubular shank of noncircularv cross-section integral with the body andadapted to be engaged in the socket of. a

. handle for-mountingthe body on'the handle,-

a substantially U-shaped, stationary outer jaw" integral with the body, said body having a bore therein communicating with the tubular shank and'with the interior of the outer jaw, an elongated cylindrical plug tightly fitted in the shank saidbody further having an opening therein communicating with'thebore, a screw slidable in the bore and traversing the opening, said screw including a reduced, smooth end portion projecting into the stationary outer jaw; an inner,

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jaw fixed on said reduced'end portion of the screw and slidable in the stationary outer jaw, the first and second-named jaws and said reduced end portion of the screw being cooperable and having substantially V-shaped grooves'therein for the reception of the corner portions of nuts and bolt heads, the inner jaw further including ends slidably engaged with the'leg portions of the substantially Ue-shaped, stationary outer jaw, 'and'a.

l nut threadedly mounted on-the screw and rotatable in the opening for adjusting the. inner jaw toward and away from the outer jaw.

GEORGE FLOWER. 

